An Application for Skin Macules Characterization Based on a 3-Stage Image-Processing Algorithm for Patients with Diabetes

Figure 3

Three-stage algorithm: (a) Stage 1—processing from skin image to segment a skin region using the AND of two skin masks (via HSV and YCbCr color space transformation). (b) Stage 2—lesion region segmentation from the skin region by means of CIE 1976 transformation followed by luminosity enhancement and PCA grayscale transformation. (c) Stage 3—Characterization of the lesion region. Calculation of the parameters for intensity, morphologic and the shade indices for macules.

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(b)

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